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Consider a mixture of ethanol (CH3OH) with gasoline for use as a spark-ignition engine fuel. Assume...
. A 4 stroke 4 cylinder spark ignition engine runs on a stoichiometric mixture of ethanol and air...
. A 4 stroke 4 cylinder spark ignition engine runs on a stoichiometric mixture of ethanol and air at wide open throttle. The 1 liter engine has a compression ratio of 9:1 and operates at 5000 rpm. The intake manifold conditions are standard pressure and temperature, no residual gas in engine combustion chamber. Using k-1.35 for all calculations the a. Calculate the indicated work done by the engine, in joules per cycle b. Calculate the indicated thermal efficiency c. Calculate...
a) A spark-ignition engine runs on hydrogen. Assume that the exhaust consists only of water vapour...
a) A spark-ignition engine runs on hydrogen. Assume that the exhaust consists only of water vapour and nitrogen. i) What is the stoichiometric air-fuel ratio by mass? (6 marks) i) If the car consumes 20 gm hydrogen per kilometre, what is the mass of water vapour discharged from the exhaust per kilometre?
5. 20% A 2.4-L gasoline fuelled internal combustion engine produces a maximum power of 220 kW...
5. 20% A 2.4-L gasoline fuelled internal combustion engine produces a maximum power of 220 kW when the fuel is burned stoichiometrically with air. The thermal efficiency of the engine at this maximum power is 43%. Methanol (CH3OH) is to be used as an alternative biofuel for this engine. The stoichiometric air-fuel ratio for gasoline is 14.6. Assume a combustion efficiency of 98%. The lower heating values of gasoline and methanol are 44 MJ/kg and 20 MJ/kg, respectively. Consider the...
Question 3 An ideal gas mixture consists of 25 percent hydrogen, 50 oxygen, and 25 carbon...
Question 3 An ideal gas mixture consists of 25 percent hydrogen, 50 oxygen, and 25 carbon monoxide, based on mass. Perform a volumetric analysis to determine the molecular weight of the mixture, in kg/kmol. Question 4 A mixture of 0.6 iso-octane and 0.4 methanol, based on weight, is combined with air and combusted. Calculate the stoichiometric air fuel ratio.
Liquid petroleum gas (LPG) is used to fuel spark-ignition engines. A typical sample of the fuel...
Liquid petroleum gas (LPG) is used to fuel spark-ignition
engines. A typical sample of the fuel consists of:
Liquid petroleum gas (LPG) is used to fuel spark-ignition engines. A typical sample of the fuel consists of: 60% by volume propane C3H8 (propane) 10% by volume butane C4H10 (butane) 30 % by volume propene C3H6 (propene) a) Write down the stoichiometric combustion equation. b) Determine the dew point of the products if the product's pressure is 100 kPa. c) Determine the...
Liquid petroleum gas (LPG) is used to fuel spark-ignition engines. A typical sample of the fuel...
Liquid petroleum gas (LPG) is used to fuel spark-ignition engines. A typical sample of the fuel consists of: 60% by volume propane C3Hs (propane) 10% by volume butane C4H10 (butane) 30 % by volume propene C3H6 (propene) a) Write down the stoichiometric combustion equation. b) Determine the dew point of the products if the product's pressure is 100 kPa. c) Determine the enthalpy of the reactants per kg of reactants (kJ/kgreactants) assuming the fuel is at 298 K and the...
A mixture of Csli vapor and air having an air coefficient of 0.9 is burnt in a spark ignition engine at constant vo...
A mixture of Csli vapor and air having an air coefficient of 0.9 is burnt in a spark ignition engine at constant volume. The pressure and temperature of charge at begging of combustion are I MMPa and 610"K, Calculate the pressure and temperature at the end of combustion. The lower calorific value of the luel is 40000 kJ/kg. CO2 Gas C8H17 07450.649 0.737 1.49 0.662 1.5 (kJ/kg C)
Suppose that a stoichiometric mixture of Isooctane (C8H18) and air is burned in an engine and...
Suppose that a stoichiometric mixture of Isooctane (C8H18) and air is burned in an engine and then the fuel is changed to 10% (by liquid volume) ethanol and 90% by liquid volume isooctane. If the liquid volumetric fuel flow rate to the engine for the blended fuel is the same as the liquid volumetric flow rate for the neat fuel, what is the equivalence ratio of the blended fuel and air mixture in the engine?
QUESTION 3 (25%). Liquid petroleum gas (LPG) is used to fuel spark-ignition engines. A typical sample...
QUESTION 3 (25%). Liquid petroleum gas (LPG) is used to fuel spark-ignition engines. A typical sample of the fuel consists of: 60% by volume propane C3H: (propane) 10% by volume butane C«Ho (butane) 30 % by volume propene C3H. (propene) a) Write down the stoichiometric combustion equation. b) Determine the dew point of the products if the product's pressure is 100 kPa. c) Determine the enthalpy of the reactants per kg of reactants (kJ/kgreactants) assuming the fuel is at 298...
A single-cylinder four-stroke-cycle spark-ignition engine has a BSFC of 0.4 kg/kW-hr and a volumetric efficiency of...
A single-cylinder four-stroke-cycle spark-ignition engine has a BSFC of 0.4 kg/kW-hr and a volumetric efficiency of 78% at a speed of 45 rps. The bore is 6 cm and the stroke is 8.5 cm. What is the fuel flow rate, fuel-air ratio, and brake torque if the brake power output is 6 kW with ambient conditions of 100 kPa and 22 C?
. A 4 stroke 4 cylinder spark ignition engine runs on a stoichiometric mixture of ethanol and air at wide open throttle. The 1 liter engine has a compression ratio of 9:1 and operates at 5000 rpm. The intake manifold conditions are standard pressure and temperature, no residual gas in engine combustion chamber. Using k-1.35 for all calculations the a. Calculate the indicated work done by the engine, in joules per cycle b. Calculate the indicated thermal efficiency c. Calculate...
a) A spark-ignition engine runs on hydrogen. Assume that the exhaust consists only of water vapour and nitrogen. i) What is the stoichiometric air-fuel ratio by mass? (6 marks) i) If the car consumes 20 gm hydrogen per kilometre, what is the mass of water vapour discharged from the exhaust per kilometre?
5. 20% A 2.4-L gasoline fuelled internal combustion engine produces a maximum power of 220 kW when the fuel is burned stoichiometrically with air. The thermal efficiency of the engine at this maximum power is 43%. Methanol (CH3OH) is to be used as an alternative biofuel for this engine. The stoichiometric air-fuel ratio for gasoline is 14.6. Assume a combustion efficiency of 98%. The lower heating values of gasoline and methanol are 44 MJ/kg and 20 MJ/kg, respectively. Consider the...
Question 3 An ideal gas mixture consists of 25 percent hydrogen, 50 oxygen, and 25 carbon monoxide, based on mass. Perform a volumetric analysis to determine the molecular weight of the mixture, in kg/kmol. Question 4 A mixture of 0.6 iso-octane and 0.4 methanol, based on weight, is combined with air and combusted. Calculate the stoichiometric air fuel ratio.
Liquid petroleum gas (LPG) is used to fuel spark-ignition
engines. A typical sample of the fuel consists of:
Liquid petroleum gas (LPG) is used to fuel spark-ignition engines. A typical sample of the fuel consists of: 60% by volume propane C3H8 (propane) 10% by volume butane C4H10 (butane) 30 % by volume propene C3H6 (propene) a) Write down the stoichiometric combustion equation. b) Determine the dew point of the products if the product's pressure is 100 kPa. c) Determine the...
Liquid petroleum gas (LPG) is used to fuel spark-ignition engines. A typical sample of the fuel consists of: 60% by volume propane C3Hs (propane) 10% by volume butane C4H10 (butane) 30 % by volume propene C3H6 (propene) a) Write down the stoichiometric combustion equation. b) Determine the dew point of the products if the product's pressure is 100 kPa. c) Determine the enthalpy of the reactants per kg of reactants (kJ/kgreactants) assuming the fuel is at 298 K and the...
A mixture of Csli vapor and air having an air coefficient of 0.9 is burnt in a spark ignition engine at constant volume. The pressure and temperature of charge at begging of combustion are I MMPa and 610"K, Calculate the pressure and temperature at the end of combustion. The lower calorific value of the luel is 40000 kJ/kg. CO2 Gas C8H17 07450.649 0.737 1.49 0.662 1.5 (kJ/kg C)
QUESTION 3 (25%). Liquid petroleum gas (LPG) is used to fuel spark-ignition engines. A typical sample of the fuel consists of: 60% by volume propane C3H: (propane) 10% by volume butane C«Ho (butane) 30 % by volume propene C3H. (propene) a) Write down the stoichiometric combustion equation. b) Determine the dew point of the products if the product's pressure is 100 kPa. c) Determine the enthalpy of the reactants per kg of reactants (kJ/kgreactants) assuming the fuel is at 298...
A single-cylinder four-stroke-cycle spark-ignition engine has a BSFC of 0.4 kg/kW-hr and a volumetric efficiency of 78% at a speed of 45 rps. The bore is 6 cm and the stroke is 8.5 cm. What is the fuel flow rate, fuel-air ratio, and brake torque if the brake power output is 6 kW with ambient conditions of 100 kPa and 22 C?
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